Discussion Overview
The discussion revolves around methods for calculating sunrise and sunset times based on geographic coordinates (latitude and longitude) and specific dates. Participants explore various equations, algorithms, and resources related to this topic, touching on both theoretical and practical aspects.
Discussion Character
- Exploratory
- Technical explanation
- Mathematical reasoning
Main Points Raised
- One participant inquires about equations or algorithms for calculating sunrise and sunset times, acknowledging the influence of latitude and the solstices on day length.
- Another participant provides a link to the sunrise equation on Wikipedia as a potential resource.
- A different participant shares a mathematical equation relating the angle of the Sun's rise or set to declination and latitude, suggesting it can help determine both the timing and direction of sunrise/sunset.
- Reference is made to Petter Duffett-Smith's book, which includes algorithms for calculating various astronomical events, including sunrise and sunset times, and mentions a later version that incorporates spreadsheet instructions.
- Another participant suggests looking into the works of Jean Meeus, who has authored several books on astronomical calculations.
Areas of Agreement / Disagreement
Participants present various resources and equations without reaching a consensus on a single method or approach. Multiple viewpoints and suggestions remain, indicating that the discussion is still open and unresolved.
Contextual Notes
Some participants note the complexity of the calculations and the influence of additional factors on sunrise and sunset times, but these factors are not fully explored or defined in the discussion.